Loans and the Allowance for Loan and Lease Losses (Details) - Composition of loan portfolio - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 3,479,441	$ 3,101,794
Net deferred (fees)	(3,609)	(2,787)
Total loans receivable	3,475,832	3,099,007
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	553,576	570,116
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	2,204,710	1,966,696
Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	486,228	328,838
Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	232,547	233,690
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 2,380	$ 2,454